diff --git a/docker/client.py b/docker/client.py
index c11980f286..d8f79c9206 100644
--- a/docker/client.py
+++ b/docker/client.py
@@ -312,7 +312,7 @@ def stream_result():
                     if line:
                         yield line
 
-            return stream and stream_result(response) or \
+            return stream_result() if stream else \
                 self._result(response, binary=True)
 
         return stream and self._multiplexed_socket_stream_helper(response) or \
@@ -651,7 +651,7 @@ def push(self, repository, stream=False):
 
             response = self._post_json(u, None, headers=headers, stream=stream)
         else:
-            response = self._post_json(u, authcfg, stream=stream)
+            response = self._post_json(u, None, stream=stream)
 
         return stream and self._stream_helper(response) \
             or self._result(response)
diff --git a/docker/utils/utils.py b/docker/utils/utils.py
index 2b5343985c..a4c8778577 100644
--- a/docker/utils/utils.py
+++ b/docker/utils/utils.py
@@ -15,6 +15,7 @@
 import io
 import tarfile
 import tempfile
+from distutils.version import StrictVersion
 
 import requests
 import six
@@ -51,7 +52,25 @@ def tar(path):
 
 
 def compare_version(v1, v2):
-    return float(v2) - float(v1)
+    """Compare docker versions
+
+    >>> v1 = '1.9'
+    >>> v2 = '1.10'
+    >>> compare_version(v1, v2)
+    1
+    >>> compare_version(v2, v1)
+    -1
+    >>> compare_version(v2, v2)
+    0
+    """
+    s1 = StrictVersion(v1)
+    s2 = StrictVersion(v2)
+    if s1 == s2:
+        return 0
+    elif s1 > s2:
+        return -1
+    else:
+        return 1
 
 
 def ping(url):